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The many faces of GESIS

Karatoprak Ersen, Dr. Rabia
Survey Data Curation
International Studies

+49 (0221) 47694-460
Rabia•KaratoprakErsen[at]gesis•org
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Vita

I am a postdoctoral researcher at the GESIS – Leibniz Institute for the Social Sciences in Cologne. I earned my Ph.D. degree in the Educational Measurement and Statistics Program at the University of Iowa (Iowa City, Iowa, USA). I have M.S. and Integrated B.S. & M.S. degree in Secondary School Mathematics Education from Bogazici University (Istanbul, Turkiye). Before joining the GESIS, I was an assistant professor of Educational Measurement and Evaluation at the Kastamonu University (Kastamonu, Turkiye). I served as a research assistant to conduct data analysis and reporting in multiple projects during my doctoral education. I was one of the 2011 Comenius Assistantship recipients, awarded by the European Union, which provided me the opportunity to gain teaching experience in Oviedo (Asturias, Spain).


Service

I conduct harmonization of cross-national survey data under the EU funded Infra4NextGen project.

Research

My research interests center around psychometric properties of scores obtained from measurement instruments. Currently, I am focused on the use of equating and linking methodologies for harmonization and providing validity and reliability evidence for the harmonized data. Previously, I have done research on equating methodologies for adjusting differences in subscores, field testing new items in a computerized multistage adaptive testing design and place their item parameter estimates on the item pool scale using the IRT based linking methodologies, the reliability of difference scores within the multivariate generalizability theoretical framework.